Attachment for controlling telephone switch-hooks.



v J. PRITH.' ATTACHMENT FCR CONTROLLING TELEPHONE SWITCH HOOKS.-

APPLICATI'OFI'ILED F018, 1912 Patented Dec.j30, 1913.

WITNESSES? I mu/g/vron J w BY '1 ATTORNEY Fig. 1;

FIG

ATTACHMENT FCR- CONTRGLLING TELEPHONE SVfITCH-HOOKS.

Specification of Letters Pa tent.

il,82,856. Patented Dec. 30*, 1913.

' Application filed November 8, rare. Ecrial no. 730,194. To cii wizom it may, conce n: 1 teleohoncs is retained at the normal or open Be it known-that 1, JOHN FRITH, a subject i circuit of the King" of Great Britain, residing at Bridgeport, county of Fairfield, State of Connecticut, have invented an improvement in Attachments for Controlling Telephone Switch-Hooks, of which the following is a specification.

This invent-ion has for its object to provide a telephone attachment adapted for use upon ordinary desk sets, so-called, thai wiii. permit connections to be made and broken by a simple movement or an element oi the attachment and wiil itself hold the receiver in a convenientposition for use, thus doing away with the necessity of detaching the re ceiver and holding it to the car during a conversation, and furthermore, what is sometimes quite important, my novel. attachment leaves both hands free for use, as in holding a pad and writing upon it,

With these and other objects in view I have devised the novel telephone attachment which I will now describe, referring to the accompanying drawing forming a part of thin specification and using reference characters to indicate the several parts.

Figure 1 is an elevation showing my novel attachment in place upon an ordinary desk telephone, the hook being in its normal position and the circuit. open as when the instrument is not in use; Fig. 2 a detail View on an enlarged scale corresponding with Fig. 8 a similar view showing the position of the hook and parts of the ab tachment. when the circuit is closed and the instrument in use; Fig. 4: a detail view as seen from the loft in Fig. 2, the hook being omitted; Fig. 5 a similar view as seen from the right in Fig. 2, the clip being omitted, and Fig. 6 is a detail elevation on an cularged scale showing the attaching means and adjustments of the carrying arm.

10 denotes the standard, l1 the transmitter, 12 the spring controlled hook, '13 the receivcr and .14. the receiver conductors of a telephonewhich may be of any ordinary or preferred construction. "I have shown a well-known form of hook which in ordinary non (as in Fig. l) by the Weight of the IQCC-tVGI' which is hung thereon. llhen the receiver is disengaged from the llOOlf 1t is thrown to the raised or circuitclosing position (as in Fig. 3} in nnv suit able manner, as by means of a spring 15 forming part of the telephone itself. As the structure or" the telephone forms no portion of the present invention, it is not thought necessary for the purposes of this specification to illustrate or describe the parts by which the circuit is opened and closed. It is suliicient to say that when the hook is in its normal or lowered position, as in Figs. 1 and Q, the circuit is open and the instrument out of use, and when the hook is in the raised position, as in F ig. 3, the circuit is closed and the instrument may be used;

My novel attachment requires no change whatever in the telephone and may be attached to any instrument in a moments time and without theuse of tools other than a screw driver.

The attachment comprises means co6perating with the telephone hook for retaining the hook in the normal or open-circuit position and for releasing it to permit. spring 15 to throw it; to the operative or circuitclosing position, as in Fig. 3. The receiver is adjustably secured to an arm 16 which is preferably tubular so that the receiver conductors may pass through it. and which is so connected to the standard as to be free to swing in. either the vertical or horizontal plane.

.17 denotes a clip whose arms inclose the receiver and are caused to grip itby means of an adjusting screw 18. 'This clip may be either rigidly or pivotally secured to a sleeve 19 which is adapted to slide on the arm and is locked in any required position by set screw 20. The other end of the arm is connected to the standard by a suitable universal joint. In the pre ent instance the arm is shown as provided with a hinge plate 521 which contacts witha similar plate on a member 22, the two plates being clamped vided with an eye provided with of the receiver.

.23 and nut 24.

the arms of a clip together to hold the arm-in any position in which it may be placed by means of ascrew Member 22 has formed at right angles with said former hinge plate 25 avhich lies between 26 which are clamped against it to retain the arm 'at any required Vertical adjustment by a screw 27.

The retaining means cooperating with the spring-controlled hook comprises a swinging catch 28 which is adapted to engage a notch .29 in a bar 30 rigidly secured to a clip 31 on the standard. The catch is pro- 32 through which the bar passes and is normally retained in the engaging position by means of a spring 33 secured to the bari 34 denotes a finger piece on convenience in operation.

The upperv end of the swinging catch is a head 35 which is pivoted as at 36 to-a yoke 37 which is attached to the hook in any suitable manner, as by means, of spring arms 38. Head 35 is also pivoted as at 39 to swinging arms L0, in turn pivoted to a head 41 at the upper end of the bar, the arms in the present instance being shown as connected by a cross piece.

The operation will be-readily understood from the drawing. The receiver is adjusted at a convenient distance from the transmitter by moving sleeve 1t) along arm 16 and looking it by set screw 20 after adjustment, and said arm is adjusted in both-the horizontal and vertical planes by means of the universal joint by which the inner end of the arm is.connected to clip 26 on the standard. To open the circuit open it is of course necessary to retain the hook in the position shown in Figs. 1 and 2,- that is the position in which it is retained in ordinary telephones by the weight This is effected with my novel attachment by engagement of the swinging catch with the notch in the bar,

another hinge plate the catch for spring 33 acting to retain it in engagement.

controlled hook, shown in the to close the circuit Suppose the parts to. be in the osition shown in Figs. 1 and-2 and the circuit open; for use the operator is simply required to disengage the catch from the notch in thebar present instance as controlled by spring 15, will move to the position shown in Fig. 3, that is the closed circuit. condition of the telephone. When the' conversation is ended the circuit either moving the may be opened again by hook downward, or moving the swinging catch downward by means of the finger piece until. the catch engages with the notch in the bar. It will be noted that in closing the circuit for a conversa'tion the operator merely disengages the swinging catch from the bar-by a movement of-the hand piece comprising a notched bar, means v to a telephone, standard, a

to which the catch and retain it when the spring-- in lieu of removing the receiver from the hook.

Having thus claim: I v

1. A- device of the character described comprisin a notched bar, means for-attaching said ar to a telephone standard, a swinging catch adapted to be pivotally connected to a telephone hook and to engage the notch in the bar and an arm for pivotally connecting the catch to the bar.

2. A device of the character described for atd'escribed invention I taching said bar catch adapted to engage the notch, a yoke is pivoted and swinging arms pivotally connected to the catch and to the bar.

3. device of the character described comprising a notched bar, means for attaching said bar to a telephone standard, a catch adapted to engage the notch, a yoke to which 'the'catch is pivoted, swinging arms pivot ally connected to the catch and to the bar and a spring to retain the catch in the engagin posltion.

4. he combination with a telephone standard and a spring-controlled hook, of

a notched bar, means for attaching saidbar to the standard, a swinging catch, means .for pivotally connecting said catch to the connecting the catch hook, a swinging arm with the bar and a spring acting to retain. the catch in engagement with the notch.

5. An attachment of the character described comprising a rigid bar provided with a notch, means for attaching said bar to a telephone standard, a catch provided with an eyethrough which the bar passes, means for pivotally connecting said catch to a telephone hook and a swinging arm pivoted to the bar and to the catch.

6. An attachment of the character described comprising a rigid bar, means for attaching said bar to a telephone standard, a catch provided with an eye through which a bar passes, means for pivotally connecting said catch to a telephone hook, a swinging arm pivoted to the bar and to the catch and a spring acting to retain the catch in engage ment with the bar. I

7. An attachment of the character described comprising a bar provided with a notch, means for attaching said bar to a telephone standard, a catch adapted to e11 gage the bar and provided with a head, a yoke to .which said head is pivoted, means for attaching said yoke to a telephone hook and a swinging arm pivoted to the bar and to the head of the catch.

8. An attachment of the character described comprising a bar provided with a notch, means for attaching said bar to a telephone standard, a catch adapted to engage the notch and provided with ahand piece, means for pivotally connecting said catch to a telephone hook and a pivotal connection intermediate said catch and the bar.

9. An attachment of the character described comprising a bar, means for attaching said bar to' a telephone standard, a catch adapted to engage said bar, means for pivotally connecting said catch to a telephone hook means for pivotally connecting said 10 catch to the bar and a spring bearing against the catch.

In testimony-whereof I afiix my signature in presence of two Witnesses.

JOHN FRITH. Witnesses:

S. W. ATHER'roN, E. M. CULVER. 

